Evolution of drop size distribution in sheared bio- polymer mixtures

Autori: S. Caserta, M. Simeone, S. Guido
Presentato al: VIII Convegno Nazionale di Reologia
Anno: 2004
Volume: Unico
Issue: Unico
Casa Editrice:
Lingua: English


Abstract
In this work, we studied the time evolution of the drop size
distribution of aqueous biopolymer mixtures in shear flow. The biopolymers
investigated are Na-alginate and Na-caseinate. The system
water, Na-alginate, Na-caseinate has been brought to the equilibrium,
two phases have been separated and characterised. Mixtures of these
phases are sheared in a parallel plate apparatus and observations are
carried out by video optical microscopy. The drop size distribution is
measured as a function of time by optically sectioning the sample via
3D motorised scanning and digital image acquisition. Image analysis
algorithms have been developed for automated processing of a large
number of images, and the results have been tested by statistical
methods. Flow conditions have been chosen in order to prevent drop
break-up and thus focus the study on drop coalescence only. The mixture
and the flow conditions have been changed in order to influence
the rate of coalescence.


Attenzione la lettura completa dell'Abstract e il download dei file è riservata esclusivamente ai Soci dell'Associazione Italiana di Reologia.

Se sei un Socio ti preghiamo di effettuare il login se non lo hai già fatto

Nel caso non fossi un Socio dell'Associazione Italiana di Reologia ti preghiamo di visitare la sezione "Iscriviti all'Associazione" per procedere alla registrazione